Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thuat mach » thuat sach, thuat tach, thuyet mach
trinh luan » trinh luat, trinh quan, trinh han
thuat tac » thuat tach, thuat tao, thuat tai
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((thuat mach) or (thuat tac)) - hanh trinh luan hang cong ((tran van) OR (luan van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((thuat mach) OR (thuat tac)) - hanh trinh luan hang cong ((tran van) OR (luan van)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((thuat mach) or (thuat tac)) - hanh trinh luan hang cong ((tran van) OR (luan van)) ban".
• Adding a wildcard symbol may retrieve word variants: ho ((thuat mach) or (thuat tac)) - hanh trinh luan hang cong ((tran van) OR (luan van)) ban*.